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calculate-n-1-1-n-cos-nx-n-2-and-n-1-1-n-sin-nx-n-2-




Question Number 38456 by maxmathsup by imad last updated on 25/Jun/18
calculate Σ_(n=1) ^∞  (−1)^n ((cos(nx))/n^2 )  and Σ_(n=1) ^∞  (−1)^n  ((sin(nx))/n^2 )
calculaten=1(1)ncos(nx)n2andn=1(1)nsin(nx)n2

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